| 摘要 |
PURPOSE:To simplify the constitution and at the same time to absorb the external impact, vibrations, etc. for an optical disk record reproducer, by using a pickup shifting mechanism which gives a linear shift to a pickup and a damper provided at the side of an intermediate pulley. CONSTITUTION:A wire which is wound 1.5 turns round the 3rd pulley 109 maintains a prescribed tension level by a spring 111 and can move in response to the revolution of a pulley 109. When a pickup 25 is moved toward an arrow Q, a feed motor 99 is driven countercloskwise. Thus a worm 104, a worm gear 107, etc. are reversed to shift the pickup 25. If an external impact is applied to the pickup 25 with a pickup shifting mechanism, the impact is transmitted to a wire 112 and the 4th pulley 113 to be absorbed by the blade member of a rotary blade of a damper device 117 and the grease viscous resistance. Thus the effect of an external impact can be minimized. |
